If you use the built-in marketplace you put in a bid. I've figured out that the bid shown is the minimum bid and not the current highest.

However I don't see anywhere that shows you what the current high bid is. I understand you can bid less than the highest in case the highest can't pay out, but not knowing what the high bid is makes bidding a random guessing name. Is there anyway to determine what the high bid is? Can you change your bid accordingly?